Volunteers on horseback and motorbikes have joined more than 70 SES personnel and police searching a 10 kilometre area around the house.

All I've got at the moment is hope - hoping someone will be honest enough to bring her home, have the guts to bring her home.

Mother Tammy O'Donnell

Police have spoken to neighbours and with family members of the three-year-old girl.

Chloe's mother, Tammy O'Donnell, has made a tearful plea for help to find her daughter.

"There's no way to describe it - it's like a nightmare I can't wake up from," she said.

She says her little girl fell asleep with her older sisters in a lounge room on Wednesday night.

"We were letting them sleep out on the mattress in the lounge room because it's school holidays, so they were just all laying on the mattress together and one by one slowly dozed off while they were watching telly," she said.

She says she locked the house but did not check if the windows were latched like she usually would have.

One was found open after Chloe disappeared.

"I'm just thinking if I had have checked them, she'd still be with [us]," she said.